Warp stop motion



Now. 18, 1 3,515.

. R. G. TURNER WARP STOP MOTION Filed Nov. 25, 1922 Patented Nov. l, 1924.,

It'lECHAIRLD GREENLEAIE TURNER, OF WORCESTER, MASSACHUSETTS, ASSIGNOR T6) CROIVIPTON & KNO'WLES L001 WORKS, 031 "WORCESTER, MASSACHUSETTS, A COR.-

PORATION OF MASSACHUSETTS.

wear s'ror MOTION. t i 1: f',

Application filed November 25, 1922. Serial No. 603,326.

To all whom it may concern:

Be it known that I, RICHARD GREENLEAF TURNER. a citizen of the United States, residing at Worcester, in the county of VVorcester and State of liiassaclnisetts have invented a new and useful Warp Stop Motion. of which the following is a specification.

This invention relates to warp stop motions of that type shown in the prior reissue patent to Regan No. 14,829, and more particularly to improvements in the knockoff mechanism usually employed with this type of motion and shown in Patent No. 1,360,638 granted to Holmes.

In the type of warp stop motion referred to the drop wires or detectors are arranged in parallel banks, each drop wire having a slot the upper part of which is narrower than the lower part. A non-circular vibrator rod is associated with each bank of detectors and is free to oscillate in the lower part of the slots when the loom is running normally, but when a detector falls due to the slackening or breaking of the corresponding warp thread the narrow part of the slot engages the rod to prevent motion thereof, and mechanism is set in operation to stop the loom. The stopping mechanism usually employed is that shown in the Holmes patent above referred to and it is the principal object of this invention to actuate the vibrator rods shown in the Began patent and the lmoolcoff motion of the Holmes patent by means a single mom-- her common to both.

Another object of the invention is to provide a pair of freely pivoted members separated during normal operation but brough; into engagement when a fault occurs in the warp to effect stoppage of the loom, combined with means to separate the two members after they have been relieved of the strain incident to knock-off.

A. further object. of the invention. is to provide means to restore the several parts of the motion to normal operating position after knock-off.

With these and other objects in view, the

invention consists in certain arrangements and comblnations of parts which Will be Referring; to Fig. 1, there is shown an end frame 10 supported by rod 11 carried by any convenient part of the loom (not shown). A, horn 19, upstandingfrom the frame carries a stud 13 on which is pivoted a lever 1 given an oscillating motion by means of a reciprocating rod 15 driven from the bottom shaft of the loom (not shown). Arms 16 are provided with studs 17 which support connecting link 18 by means of which the arms are required to move in unison. Each arm has secured thereto a bearing; 19 rotatably mounted in the frame 1.0 and slotted to receive one of the non circular vibrator rods 20 already referred to as passing through the drop wires, (indicated at 21). The oscillation of lever 14 is connnunicated to the vibrator rods by devices to be described hereinafter, the vibrator rods being free to oscillate unobstructed when all the detectors are in raised position but being resisted when any one of them falls to permit the restricted part of the slot 92 to engage the vibrator rods.

Also pivoted on stud is a knock-off lever connected which extends to the loom shipper (not shown) to stop the loom henever knock-off lever moves to the left. referring to Fig. 1. A dog 25 pivoted to the lever 23 is engagec'l at warp fault to give the latter its knock-oil motion. The matter thus far described is shown in the Holmes patout already mentioned. to which reference may be made for a of the loom connections.

The improvements forming the subject matter of the present invention include actuator 26 pivotedat 2? to the oscillating lever 14. One of the studs ktending from more complete showing to knock-off rod the arms 16 and link 18, as 17 is lengthened to pass under the actuator and notch. 28 formed therein, a shown in J. 1 and 2 That side of the notch adjac to pivot 2'? is abrupt and when in en ment with stud 17* requires the latter move to the right (as illustrated in Fig. 1 whenever lever 14 movestoward said stud. The opposite side of the notch is formed with an incline which will ride up on stud 17 when said stud is held against move ment. this action resulting in raising the free end of the actuator and moving o Qlt'ormed thereon into engaging position with dog 25.

In order that the llorce required to hit the actuator may be varied there is pro vided a weight 31 adjustahly mounted on rod 32 extending irorn the ctuator.

T he dog 25 has an overlr rginn a on 38 resting on support fixed to the frame 10 and said arm is provided. with a or. n face 35 which serves to raise the dog as the lever 23 moves to knoclrl-ofi position. 36 also fixed to "frame 10 limits the motion of the arms 16 in a manner to he described.

Assuming; the loom to he running ormally,.lei *er 23, rod 24. and dog 25 will he held. to the right shown in Fig. l and lever 1 will he given periodic oscillations. Actuator '26 moves hack and "forth with lever ls. and as long as the vibrator rods are free to rock, the weight of the actuator against stud 17 will be suliicient to maintain driving connections between lever 14 and the vihrator rods. Under these conditions the parts will more from the position shown inllig. 1 to that shown in Fig. 3 and heck'ag ain, this action continuing until a detector lalls'and the rocking; of the corresponding vibrator rod is resisted. When this occurs the stud 17 will remain in the position shown in Fig. 1 and the actuator, inmoving on its working stroke to the l with lever 14, will he raised as previously described and hook 529 will engage dog 25 as shown in F 4:. Continued motion of: lever 14' will more the parts to the position shownin Fig. 5, where it will be seen hat red. has been moved to kneel position to stop the loom and that and support hzwe raised the .hove the. path of th hook. It will also he noted t, as

the actuator approaches the end of its knock-oil stroke stud 1? passes into notch 30. formed in the actuator. to permit the latter to'it'all and move hook 29 away from dog 25.

When the usual types of loom shippers are in running position the opping of the loom maybe eti ected l -y girl. 51 the shipper an initial partial movement. after which the pa ts will-co ne to more to c mplete kneels-elf posit For this reason. when the parts assume the position shown sition shown in Fig. 5 to that shown in Fig.

1. Because of the spaced relation oi the hook and don. the letter moves hovoud the hook without engagement therewith.

It will he noted that when startiupj the loomal'ter stop an'e hc eusc of wnrp i'nult. the stud 17 is in notch 30 and in order lo prevent arms 16 from passing hevond their proper position the arm adjacent lug i-l engages the latter to arrest further motion of the arms. after which the notch 28 approaches stud 17 and the parts are restored to normal operation; position.

From the foregoing; it will he seen that the invention provides a very simplc means for actuating both the vibrator rods and. the knock-oft mechanism, the normal working stroke of the actuator being! accompanied either by oscillation of the vibrator rods or operation of the knock-oft mechanism. It will also be seen that the actuator and dos. each has a motion away from the other as these parts approach the limit oi their knocking-(iii? motion. thus permitting; start ing; of the loom. Also, means is provided to restore the stud l7 and notch 28 to normal operative position.

It will he evident that changes and modifications can he made in the practice oi tho invention hv those skilled in the art with out departing from the spirit and scope thereof as vtorrh in the claims. and the invention is not to be otherwise limited to the details disclosed herein, but what is claimed is- 1. In a. warp stop motion. a. hunk of drop detectors. a vibrator normallr, tree to vihratc hut arrestahle by a fallen detector. :1 reuu larl; moving member. :1. weighted ociuntor pivoted to the member. a support for said. actuator mo able ind. arrestshle with said vibrator. knockoff mechanism. a dog p voted. on said knock-oil mechanism. means to raise said weighted actual-or out o dri ing contact with the support and into operative elationship with the dog when the vibrator and support are arrested by a tnllen drop. and a fixed support for said doe; independent of the lniocleoili mechanism to cooperate with a part oi the dog; to move the latter nwav from the actuator as the actuator nears the end of a knock-oil stroke.

2. In a warp stop motion. bank of drop detectors. an arrestahle rihr'iitor norrhallv free to vibrate but arrest-able by a fallen de- QII tector, a regularly moving member, a weight ed actuator pivoted to said member, a support for said actuator movable and arrestable with the vibrator and fitting into a notch in the weighted actuator, knock-off mechanism, means to move the actuator out of driving contact with the support when the vibrator is arrested by a fallen detector and into operative relationship with the knockoff mechanism, said actuator having a second notch spaced from the first named notch to receive the support when the latter is arrested to permit said actuator to move out of operative relationship with the knockoff mechanism as the actuator nears the end of its knock-off stroke.

37 In a warp stop motion, a bank of drop detectors, an arrestable vibrator associated therewith normally free to vibrate but arrestable by a fallen detector, a regularly reciprocating actuator, knock-off mechanism including a pivoted dog movable bodily with the actuator, a fixed support for the dog, and

means formed on said dog to engage said fixed support as said dog moves with the actuator in a knock-off stroke to move the dog away from the path of movement of the actuator as the latter nears the end of the knock-off stroke. I

4-. In a warp stop motion, a bank of drop detectors, a vibrator therefor normally free to vibrate but arrestable by a fallen detector, a regularly moving member, a weighted actuator pivoted to the member, knock-off mechanism, a support for the actuator movable and arrestable with the vibrator, means to move the actuator out of driving, contact with the support and into operative relationship with the knockoff mechanism when. the vibrator is arrested, and an adjustably mounted counter-balance operatively connected to the actuator to vary the weight of the same against the support therefor.

In testimony whereof I have hereunto affixed m signature.

RICHARD GREENLEAF TURNER. 

